Support frame for rectangular duct



FIG. 1 is a perspective view of the support frame for a rectangular duct showing a first embodiment of the design.

FIG. 2 is a top plan view of FIG. 1.

FIG. 3 is a front elevation view of FIG. 1.

FIG. 4 is a right side elevation view of FIG. 1; the left side being a mirror image thereof.

FIG. 5 is a bottom plan view of FIG. 1.

FIG. 6 is a perspective view the support frame for a rectangular duct showing a second embodiment of the design.

FIG. 7 is a top plan view of FIG. 6.

FIG. 8 is a front elevation view of FIG. 6.

FIG. 9 is a right side elevation view of FIG. 6; the left side being a mirror image thereof; and,

FIG. 10 is a bottom plan view of FIG. 6. 

The ornamental design for the support frame for a rectangular duct, as shown and described. 